2.5-18.1

sysdeps/unix/sysv/linux/sparc/sparc64/clone.S

@@ -22,34 +22,52 @@
 
 #include <asm/errno.h>
 #include <asm/unistd.h>
+#include <tcb-offsets.h>
+#include <sysdep.h>
 
-/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
+#define CLONE_VM	0x00000100
+#define CLONE_THREAD	0x00010000
+
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
+	     pid_t *ptid, void *tls, pid_t *ctid); */
+
+	.register	%g2,#scratch
+	.register	%g3,#scratch
 
 	.text
-	.align	4
-	.globl	__clone
-	.type	__clone,@function
 
-__clone:
+ENTRY (__clone)
 	save	%sp, -192, %sp
+	cfi_def_cfa_register(%fp)
+	cfi_window_save
+	cfi_register(%o7, %i7)
 
 	/* sanity check arguments */
-	brz,pn	%i0, 99f
-	 mov	%i0, %l0		/* save fn */
-	brz,pn	%i1, 99f
-	 mov	%i3, %l3		/* save arg */
+	brz,pn	%i0, 99f		/* fn non-NULL? */
+	 mov	%i0, %g2
+	brz,pn	%i1, 99f		/* child_stack non-NULL? */
+	 mov	%i2, %o0		/* clone flags */
+
+	/* The child_stack is the top of the stack, allocate one
+	   whole stack frame from that as this is what the kernel
+	   expects.  Also, subtract STACK_BIAS.  */
+	sub	%i1, 192 + 0x7ff, %o1
+	mov	%i3, %g3
+	mov	%i2, %g4
+
+	mov	%i4,%o2			/* PTID */
+	mov	%i5,%o3			/* TLS */
+	ldx	[%fp+0x7ff+176],%o4	/* CTID */
 
 	/* Do the system call */
-	sub	%i1, 0x7ff, %o1
-	mov	%i2, %o0
 	set	__NR_clone, %g1
 	ta	0x6d
 	bcs,pn	%xcc, 99f
 	 nop
 	brnz,pn	%o1, __thread_start
-	 mov	%o0, %i0
-	ret
-	 restore
+	 nop
+	jmpl	%i7 + 8, %g0
+	 restore %o0, %g0, %o0
 99:
 #ifndef _LIBC_REENTRANT
 #ifdef PIC
@@ -71,18 +89,33 @@ __clone:
 	 nop
 	st	%i0, [%o0]
 #endif
-	ret
+	jmpl	%i7 + 8, %g0
 	 restore %g0,-1,%o0
-	.size __clone, .-__clone
+END(__clone)
 
 	.type __thread_start,@function
 __thread_start:
+	cfi_startproc
+#ifdef RESET_PID
+	sethi	%hi(CLONE_THREAD), %l0
+	andcc	%g4, %l0, %g0
+	bne,pt	%icc, 1f
+	 andcc	%g4, CLONE_VM, %g0
+	bne,a,pn %icc, 2f
+	 mov	-1,%o0
+	set	__NR_getpid,%g1
+	ta	0x6d
+2:	st	%o0,[%g7 + PID]
+	st	%o0,[%g7 + TID]
+1:
+#endif
 	mov	%g0, %fp	/* terminate backtrace */
-	sub	%sp, 6*8, %sp	/* provide arg storage */
-	call	%l0
-	 mov	%l3,%o0
+	call	%g2
+	 mov	%g3,%o0
 	call	_exit,0
 	 nop
-	.size __thread_start, .-__thread_start
+	cfi_endproc
 
-weak_alias(__clone, clone)
+	.size	__thread_start, .-__thread_start
+
+weak_alias (__clone, clone)